ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,458, issued on March 17, was assigned to NEC Corp. (Tokyo).

"Signal processing device, signal processing method, and recording medium" was invented by Yuki Yamaguchi (Tokyo) and Taichi Tanaka (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A signal processing device sets the value of a hyperparameter for array signal processing in synthetic aperture radar tomography, by using a SAR image group of a phase reference point at which phase reference point known information, which is information pertaining to the position of a reflector, is obtained; and performs SAR image group generation processing, using the array signal processing in which the ...